Deletion of and causes abnormal skull morphology and global developmental delay.

The ETS2 repressor factor (ERF) is a transcription factor in the RAS-MEK-ERK signal transduction cascade that regulates cell proliferation and differentiation, and pathogenic sequence variants in the gene cause variable craniosynostosis inherited in an autosomal dominant pattern. The reported variants are largely loss-of-function, implying haploinsufficiency as a primary disease mechanism; however, gene deletions have not been reported previously. Here we describe three probands with macrocephaly, craniofacial dysmorphology, and global developmental delay.

Discordant phenotype caused by mutation in siblings with .

With the advent of next-generation sequencing (NGS), a blended phenotype has been shown to be caused by multilocus molecular diagnosis. Here, we present siblings of neurofibromatosis type 1 (NF1) with discordant phenotypes. Further genetic investigation revealed that the younger sister had trisomy 8 mosaicism with a low ratio and a known pathogenic mutation in the gene.

Novel mutation in a fetus with early prenatal onset of schizencephaly.

Porencephaly and schizencephaly are congenital brain disorders that can be caused by mutations, though the underlying mechanism and developmental processes are poorly understood. Here, we report a patient with schizencephaly, detected by fetal ultrasonography and fetal magnetic resonance imaging, with a de novo novel mutation in (c.2645_2646delinsAA, p.

Refining the clinical phenotype of Okur-Chung neurodevelopmental syndrome.

We describe an 8-year-old Japanese boy with a recurrent missense mutation in , c.593A>G, that is causative of Okur-Chung neurodevelopmental syndrome. He exhibited distinctive facial features, severe growth retardation with relative macrocephaly, and friendly, hyperactive behavior.

Maternal socio-demographic and psychological predictors for risk of developmental delays among young children in Mongolia.

Background: Factors influencing child development are not well studied in developing settings, and especially in Mongolia. This cohort study examined the relationship between maternal socio-demographic and psychological conditions on risk of young child developmental delay.

Methods: A total of 150 children aged between 13 ~ 24 months old participated in this study.

Novel SYNGAP1 variant in a patient with intellectual disability and distinctive dysmorphisms.

We describe a novel de novo heterozygous variant in SYNGAP1 (c.1741C>T, p.R581W), identified through targeted resequencing in an 8-year-old boy with intellectual disability, autism spectrum disorder, distinctive dysmorphic features, and no seizures.

Republication: Two Premature Neonates of Congenital Syphilis with Severe Clinical Manifestations.

Congenital syphilis (CS) is a public health burden in both developing and developed countries. We report two cases of CS in premature neonates with severe clinical manifestations; Patient 1 (gestational age 31 weeks, birth weight 1423 g) had disseminated idiopathic coagulation (DIC) while Patient 2 (gestational age 34 weeks and 6 days, birth weight 2299 g) had refractory syphilitic meningitis. Their mothers were single and had neither received antenatal care nor undergone syphilis screening.

An hour-specific transcutaneous bilirubin nomogram for Mongolian neonates.

Unlabelled: Transcutaneous bilirubin (TcB) nomograms have been developed for different populations. However, the TcB level, rate of rise and peak varies among countries and ethnicities. The aim of this study was to establish an hour-specific TcB nomogram for healthy term and late preterm Mongolian neonates during the first 144 h after birth.

Validation of a transcutaneous bilirubin meter in Mongolian neonates: comparison with total serum bilirubin.

Background: Neonatal hyperbilirubinemia, especially kernicterus, can be prevented by screening for neonatal jaundice. The transcutaneous bilirubin (TcB) meter is a non-invasive medical device for screening neonates. The study aimed to investigate the validity of a TcB meter in a resource-limited setting such as Mongolia.

A Japanese neonatal case of glucose-6-phosphate dehydrogenase deficiency presenting as severe jaundice and hemolytic anemia without apparent trigger.

Background: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is rare among Japanese ethnicity although it is known as one of the most common hereditary disorders of erythrocytes, causing intravascular hemolysis. It is well-known that G6PD deficiency may cause hemolysis even in the neonatal period. However, most cases are asymptomatic, and the frequency of severe anemia is low.

Fracture of a Broviac catheter in a low-birth-weight infant.

Central venous catheters are widely used in children, particularly in very-low-birth-weight infants in whom long-term access to the venous system is required. This may be achieved by using peripherally inserted central catheters or tunnelled central venous lines (eg Broviac or Hickman lines). Previous case reports of fractured central catheters in premature neonates have involved peripherally inserted silastic catheters.

Early delayed-type hypersensitivity eosinophil infiltrates depend on T helper 2 cytokines and interferon-gamma via CXCR3 chemokines.

We investigated the role of T helper (Th)1- and Th2-type cytokines in delayed-type hypersensitivity to soluble protein antigens elicited early postimmunization. Mice were sensitized by intradermal injection without adjuvants, or subcutaneously with complete Freund's adjuvant, and subsequently ear challenged intradermally. As soon as day 3, antigen-specific eosinophil-rich responses were elicited in wild-type mice, but not in T-cell receptor-alpha-/- mice without adjuvant.

Cutaneous immunization rapidly activates liver invariant Valpha14 NKT cells stimulating B-1 B cells to initiate T cell recruitment for elicitation of contact sensitivity.

T cell recruitment to elicit contact sensitivity (CS) requires a CS-initiating process mediated by B-1 cells that produce IgM, which activates complement to promote T cell passage into the tissues. We now show that Valpha14i NKT cells induce B-1 cell activation likely by releasing IL-4 early postimmunization. The CS initiation process is absent in Jalpha18-/- and CD1d-/- NKT cell-deficient mice and is reconstituted by populations enriched for Valpha14i NKT cells.

B-1 B cells mediate required early T cell recruitment to elicit protein-induced delayed-type hypersensitivity.

We define the initiation of elicited delayed-type hypersensitivity (DTH) as a series of processes leading to local extravascular recruitment of effector T cells. Responses thus have two sequential phases: 1) 2-h peaking initiation required for subsequent recruitment of T cells, and 2) the late classical 24-h component mediated by the recruited T cells. We analyzed DTH initiation to protein Ags induced by intradermal immunization without adjuvants.

B cell-dependent T cell responses: IgM antibodies are required to elicit contact sensitivity.

Contact sensitivity (CS) is a classic example of in vivo T cell immunity in which skin sensitization with reactive hapten leads to immunized T cells, which are then recruited locally to mediate antigen-specific inflammation after subsequent skin challenge. We have previously shown that T cell recruitment in CS is triggered by local activation of complement, which generates C5a that triggers C5a receptors most likely on mast cells. Here, we show that B-1 cell-derived antihapten IgM antibodies generated within 1 day (d) of immunization combine with local challenge antigen to activate complement to recruit the T cells.